Coin validation apparatus

Details Coin validation apparatus Coin validation apparatus

1989-10-12

1991-11-05

Bartuska, F. J.

Check-actuated control mechanisms

Including means to test validity of check

By testing material composition

194339, 177211, G07D 504

Patent

active

050625187

ABSTRACT:
Coin validation apparatus having a coin chute including a hard striking surface upon which a coin entering the apparatus is directed. A microphone is positioned to detect acoustic vibrations of the coin after it strikes the striking surface. An output from the microphone is applied to a fast fourier transform device to produce a signal analysis of the coin vibration. A weighbridge measuring apparatus which is made up of a flexible strip of resilient material carried on a support at each end is provided. The coin rolls across the flexible strip to cause a temporary deflection of a center portion of the strip. A strain gauge located at the strip center to produce an electrical signal representative of the deflection. A classifier compares the signal analysis and the strain gauge signal with stored data representative of a set of standard coins, for classifying the coin as a particular coin value.

REFERENCES:
patent: 2317351 (1943-04-01), Andalikiewicz et al.
patent: 4096933 (1978-06-01), Massa
patent: 4848556 (1989-07-01), Shah et al.

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